Method and device for transmitting or receiving data in next generation wireless access network

ABSTRACT

Provided is a method for designing downlink control channel for satisfying requirement of the different usage scenarios from each other in a next-generation/5G radio access network which has been discussed in the 3rd generation partnership project (3GPP). In particular, a method of a base station may be provided for transmitting/receiving data in a next-generation radio access network. The method may include configuring a time domain scheduling unit made up of at least one OFDM symbol for each user equipment, allocating a downlink data channel transmission resource with the time domain scheduling unit for a first user equipment, and puncturing a part of the downlink data channel transmission resource for the first user equipment and allocating the punctured resource to the downlink data channel transmission resource for a second user equipment.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a National Stage Patent Application of PCTInternational Patent Application No. PCT/KR2017/008944 (filed on Aug.17, 2017) under 35 U.S.C. § 371, which claims priority to Korean PatentApplication Nos. 10-2016-0112748 (filed on Sep. 1, 2016) and10-2017-0059543 (filed on May 12, 2017), the teachings of which areincorporated herein in their entireties by reference.

TECHNICAL FIELD

The present disclosure relates to operation of a user equipment and abase station for transmitting/receiving data in a next-generation/5Gradio access network (hereinafter, referred to as a new radio (NR))which has been discussed in the 3rd generation partnership project(3GPP).

BACKGROUND ART

Recently, the 3rd generation partnership project (3GPP) has approved the“Study on New Radio Access Technology”, which is a study item forresearch on next-generation/5G radio access technology. On the basis ofthe Study on New Radio Access Technology, Radio Access Network WorkingGroup 1 (RAN WG1) has been discussing frame structures, channel codingand modulation, waveforms, multiple access methods, and the like for anew radio (NR).

It is required to design the NR not only to provide an improved datatransmission rate as compared with the long term evolution (LTE), butalso to meet various requirements in detailed and specific usagescenarios.

An enhanced mobile broadband (eMBB), a massive machine-typecommunication (mMTC), and an ultra-reliable and low latencycommunication (URLLC) are proposed as representative usage scenarios ofthe NR. In order to meet the requirements of the individual scenarios,it is required to design NR to have flexible frame structures, comparedwith the LTE.

As a method for satisfying these various usage scenarios, a method forsupporting scheduling units having different lengths in the time domainis being discussed.

In order to satisfy the URLLC requirement, the scheduling unit in thetime domain needs to be subdivided. However, in terms of the eMBB, anoverly subdivided scheduling unit has an undesirable problem in terms ofcell throughput accompanied with excessive control overhead. Also, interms of the mMTC, a slightly longer time domain resource allocationscheme may be appropriate for coverage enhancement.

Therefore, there is required a resource allocation method capable ofsatisfying each requirement for various usage scenarios.

DETAILED DESCRIPTION OF THE INVENTION Technical Problem

It is an object of the present disclosure to provide a resourceallocation method for satisfying the requirement of a usage scenariosuch as the URLLC in a long time domain resource allocation structuresuch as the eMBB or the mMTC in a next-generation/5G radio accessnetwork.

Technical Solution

An aspect of the present disclosure is to provide a method oftransmitting/receiving data by a base station in a next-generation radioaccess network, the method including configuring a time domainscheduling unit composed of OFDM symbols for each user equipment,allocating a downlink data channel transmission resource with the timedomain scheduling unit for a first user equipment, and puncturing a partof the downlink data channel transmission resource for the first userequipment and allocating the punctured resource to the downlink datachannel transmission resource for a second user equipment.

Another aspect of the present disclosure is to provide a method oftransmitting/receiving data by a user equipment in a next-generationradio access network, the method including transmitting/receiving thedata through an allocated resource with a time domain schedulingconfigured for each user equipment from a base station, receiving apre-emption indication information indicating a punctured resourcewithin the time domain scheduling unit including the allocated resource,and stopping transmitting/receiving the data according to thepre-emption indication information.

Further another aspect of the present disclosure is to provide a basestation transmitting/receiving data in a next-generation radio accessnetwork, the method including a controller configured to configure atime domain scheduling unit composed of an OFDM symbol for each userequipment, allocate a downlink data channel transmission resource withthe time domain scheduling unit for a first user equipment and puncturea part of the downlink data channel transmission resource for the firstuser equipment to allocate the punctured resource to the downlink datachannel transmission resource for a second user equipment, and atransmitter configured to transmit a downlink data channel according tothe allocated downlink data channel transmission resource.

Yet another aspect of the present disclosure is to provide a userequipment transmitting/receiving data in a next-generation radio accessnetwork, the method including a receiver configured to receive the datathrough an allocated resource with a time domain scheduling configuredfor each user equipment from a base station and receive a pre-emptionindication information indicating a punctured resource within the timedomain scheduling unit including the allocated resource from a basestation, and a controller configured to stop transmitting/receiving thedata according to the pre-emption indication information.

Effects of the Invention

In accordance with embodiments of the present disclosure, a resourceallocation method is provided for a usage scenario that requires adetailed resource allocation structure in a long time domain resourceallocation structure. Accordingly, various usage scenarios may besatisfied in a next-generation/5G radio access network.

BRIEF DESCRIPTION OF THE DRAWINGS

FIGS. 1 to 3 are diagrams illustrating exemplary puncturing indicationchannels (or a preemption indication signal) in a method of transmittingand receiving data in a next generation radio access network accordingto embodiments.

FIGS. 4 and 5 are flowcharts illustrating a method of transmitting andreceiving data in a next generation radio access network according toembodiments.

FIG. 6 is a diagram illustrating a base station according to at leastone embodiment of the present disclosure.

FIG. 7 is a diagram illustrating a user equipment according to at leastone embodiment of the present disclosure.

MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present disclosure will be described indetail with reference to the accompanying drawings. In adding referencenumerals to elements in each drawing, the same elements will bedesignated by the same reference numerals, if possible, although theyare shown in different drawings. Further, in the following descriptionof the present disclosure, a detailed description of known functions andconfigurations incorporated herein will be omitted when it is determinedthat the description may make the subject matter of the presentdisclosure rather unclear.

In the present disclosure, a machine type communication (MTC) device mayrefer to a device supporting low cost (or low complexity), a devicesupporting coverage enhancement, or the like. The MTC device may referto a device that supports low cost (or low complexity) and coverageenhancement, or the like. The MTC device may refer to a device definedin a predetermined category for supporting low cost (or low complexity)and/or coverage enhancement.

In other words, the MTC device may refer to a low cost (or lowcomplexity) user equipment (UE) category/type newly defined in 3GPPRelease-13 and performing LTE-based MTC-related operations. As anotherexample, the MTC device may refer to a UE category/type defined in orbefore 3GPP Release-12, which supports enhanced coverage in comparisonwith the typical LTE coverage or supports low power consumption, or mayrefer to a low cost (or low complexity) UE category/type newly definedin Release-13.

A wireless communication system is widely installed to provide variouscommunication services, such as a voice communication service, a packetdata service, etc. The wireless communication system includes a userequipment (UE) and a base station (BS, or eNB). The UE is defined as ageneric term including terminals used in wireless communication, andtherefore includes as well as UEs in wideband code division multipleaccess (WCDMA), long term evolution (LTE), high speed packet access(HSPA), and the like, a mobile station (MS) in global systems for mobilecommunication (GSM), a user terminal (UT), a subscriber station (SS), awireless device, or the like.

The BS or a cell generally refers to a station communicating with theUE. The BS or cell may be referred to as a Node-B, an evolved Node-B(eNB), a sector, a site, a base transceiver system (BTS), an accesspoint, a relay node, a remote radio head (RRH), a radio unit (RU), asmall cell, or the like.

In the present disclosure, the BS or cell is defined as a generic termdenoting i) base stations, such as a base station controller (BSC) inCDMA, a Node-B in the WCDMA, an evolved Node-B (eNB) or a sector (site)in the LTE, and the like, and ii) coverage areas or functions covered bythe base station, such as a megacell, a macrocell, a microcell, apicocell, a femtocell and small cell communication range of a relaynode, a RRH, and a RU.

Since each of the above-described various cells is controlled by a BS,therefore the BS may be classified into two categories. The BS may bereferred to i) an apparatus that provides a megacell, a macrocell, amicrocell, a picocell, a femtocell, or a small cell, in association witha radio area, or ii) the radio area itself. In i), the BS may bereferred to a) apparatuses that form a corresponding radio area and arecontrolled by the same entity or b) apparatus interact and cooperate toeach other to configure a corresponding radio area. According to amethod of establishing a radio area, the BS may be referred to as aneNB, a RRH, an antenna, a RU, a low power node (LPN), a point, atransmission/reception point, a transmission point, a reception point,or the like. In ii), the BS may be a radio area itself for receiving ortransmitting a signal from UE perspective or neighboring BS perspective.

Accordingly, the megacell, the macrocell, the microcell, the picocell,the femtocell, or the small cell, the RRH, the antenna, the RU, the LPN,the point, the eNB, the transmission/reception point, the transmissionpoint, or the reception point are collectively referred to as the BS.

In the present disclosure, the UE and the BS are two entities forperforming transmission/reception used to embody the technology andtechnical spirit described in the present specification. The UE and theBS are defined as a generic term and not limited to specific terms orwords. The UE and the BS are two entities for performingtransmission/reception through uplink or downlink used to embody thetechnology and technical spirit described in the present disclosure. TheUE and the BS are defined as a generic term and not limited to specificterms or words. The uplink (UL) refers to a schemetransmitting/receiving data by a UE to/from a BS, and the downlink (DL)refers to a scheme transmitting/receiving data by a BS to/from a UE.

Any of multiple access techniques may be applied to the wirelesscommunication system. Various multiple access techniques may includecode division multiple access (CDMA), time division multiple access(TDMA), frequency division multiple access (FDMA), orthogonal frequencydivision multiple access (OFDMA), OFDM-TDMA, OFDM-FDMA, OFDM-CDMA, orthe like. At least one embodiment of the present disclosure may beapplied to resource allocation in as well as asynchronous wirelesscommunication evolving into LTE/LTE-advanced and IMT-2020 beyond GSM,WCDMA, and HSPA, synchronous wireless communication evolving into CDMA,CDMA-2000, and UMB. The present disclosure is not limited to or shallnot be construed to be limited to a particular wireless communicationfield, and is construed as including all technical fields to which thespirit of the present disclosure may be applied.

UL transmission and DL transmission may be performed based on i) a timedivision duplex (TDD) technique performing transmission throughdifferent time slots or ii) a frequency division duplex (FDD) techniqueperforming transmission through different frequencies.

Further, in some systems such as the LTE or LTE-advanced, a relatedstandard defines that the UL and the DL are configured based on a singlecarrier or a pair of carriers. The UL and the DL may transmit controlinformation through control channels, such as a physical DL controlchannel (PDCCH), a physical control format indicator channel (PCFICH), aphysical hybrid ARQ indicator channel (PITCH), a physical UP controlchannel (PUCCH), an enhanced physical DL control channel (EPDCCH), orthe like. Furthermore, the UL and the DL may transmit data through datachannels, such as a physical DL shared channel (PDSCH), a physical ULshared channel (PUSCH), or the like.

Meanwhile, control information may be transmitted through an enhancedPDCCH (EPDCCH) or extended PDCCH (EPDCCH).

In the present disclosure, the cell may refer to a coverage of a signaltransmitted from a transmission point or a transmission/reception point,a component carrier having the coverage of the signal transmitted fromthe transmission point or the transmission/reception point, or thetransmission/reception point itself.

In some embodiments, a wireless communication system may be i) acoordinated multi-point transmission/reception system (CoMP system) inwhich two or more transmission/reception points cooperate to transmit asignal, ii) a coordinated multi-antenna transmission system, or iii) acoordinated multi-cell communication system. The CoMP system may includeat least two multiple transmission/reception points and UEs.

The multiple transmission/reception points may be at least one RRH thatis connected to a BS or macrocell (hereinafter, referred to as ‘eNB’)through an optical cable or an optical fiber and thereby controlled in awired manner, and that has high transmission power or low transmissionpower in a macrocell area.

Hereinafter, the DL denotes communication or a communication path frommultiple transmission/reception points to a UE, or the UL denotescommunication or a communication path from the UE to the multipletransmission/reception points. In the DL, a transmitter may be a part ofmultiple transmission/reception points and a receiver may be a part ofthe UE. In the UL, a transmitter may be a part of the UE and a receivermay be a part of multiple transmission/reception points.

Hereinafter, “a signal is transmitted/received through a channel, suchas PUCCH, PUSCH, PDCCH, EPDCCH, PDSCH or the like” may be referred to as“a channel such as PUCCH, PUSCH, PDCCH, EPDCCH or PDSCH is transmittedor received.”

In addition, hereinafter, a description of transmitting or receiving aPDCCH or a description of transmitting or receiving a signal through thePDCCH may have the same meaning including transmitting or receiving anEPDCCH or transmitting or receiving a signal through the EPDCCH.

That is, a physical DL control channel described below may denote aPDCCH or an EPDCCH, or is also used as meaning including both the PDCCHand the EPDCCH.

Also, for convenience of description, an EPDCCH may be applied to anembodiment described with the PDCCH, as an embodiment of the presentdisclosure, and the PDCCH may be also applied to an embodiment describedwith the EPDCCH as an embodiment.

Meanwhile, higher layer signaling described below contains radioresource control (RRC) signaling transmitting RRC information containingan RRC parameter.

The eNB performs DL transmission to UEs. The eNB may transmit a physicalDL shared channel (PDSCH) which is a primary physical channel forunicast transmission, and a physical DL control channel (PDCCH) fortransmitting i) DL control information such as scheduling required toreceive the PDSCH and ii) scheduling approval information fortransmission through an UL data channel (for example, a physical ULshared channel (PUSCH)). Hereinafter, transmission/reception of a signalthrough each channel will be described as transmission/reception of thecorresponding channel.

NR (New Radio)

Recently, the 3GPP has approved the “Study on New Radio AccessTechnology”, which is a study item for research on next-generation/5Gradio access technology. On the basis of such a study item, the 3GPPhave started discussions about frame structure, channel coding &modulation, waveform, multiple access scheme, etc.

It is required to design the NR not only to provide an enhanced datatransmission rate as compared with that of LTE/LTE-Advanced, but also tomeet various requirements for detailed and specific usage scenarios.

In particular, the eMBB, the mMTC, and the URLLC have been discussed asrepresentative usage scenarios of the NR, and it has been required todesign more flexible frame structures as compared with those forLTE/LTE-Advanced in order to meet the requirements of each usagescenario.

Specifically, the eMBB, the mMTC, the URLLC are considered asrepresentative usage scenarios of the NR. Since each usage scenarioimposes a different requirement of data rates, latency, coverage, etc.,many discussions have been conducted for a technique of efficientlymultiplexing radio resource units based on different types of numerology(e.g., a subcarrier spacing (SCS), a subframe, a transmission timeinterval (TTI), etc.) in order to efficiently satisfy requirements ofusage scenarios through a frequency band of any NR system.

For example, there is a need to support a structure of 1 ms subframe (or0.5 ms slot) based on 15 kHz subcarrier spacing in the same way as thetypical LTE, a structure of 0.5 ms subframe (or 0.25 ms slot) based on30 kHz subcarrier spacing, and a structure of 0.25 ms subframe (0.125 msslot) based on 60 kHz subcarrier spacing over a single NR frequencyband.

There have been discussions on how to configure a subframe composed of XOFDM symbols (e.g., X=14 or 7, or any other natural number) or a slotmade up of Y OFDM symbols (Y=14 or 7, or any other natural number),define mini-slots made up of Z OFDM symbols (s) (e.g., Any naturalnumber satisfying Z<Y & Z<X), as a resource allocation unit in the timedomain (i.e., a scheduling unit in the time domain) in any numerology(i.e., subcarrier spacing structure).

As described above, there have been discussions on a method forsupporting various scheduling units each having a length different fromthe other in the time domain as a method for satisfying various usagescenarios in the NR.

In particular, in order to satisfy the URLLC requirement, it isnecessary to subdivided the scheduling unit in the time domain.

From the eMBB perspective, however, an overly subdivided time domainscheduling unit is not desirable from a cell throughput point of viewbecause of excessive control overhead. Also, in terms of the mMTC, alonger domain resource allocation scheme may be more suitable forcoverage enhancement.

The present disclosure introduces a resource allocation method forsatisfying the URLLC requirement even in a long time domain resourceallocation structure such as the eMBB and the mMTC.

As described above, in order to support the URLLC service in the NR, itis necessary to support a short scheduling unit (or TTI (TransmissionTime Interval)) that may satisfy the latency boundary in the timedomain.

On the other hand, in the case of the eMBB or the mMTC, it is effectiveto apply the time domain resource allocation unit, which is slightlylonger than the URLLC usage scenario, in terms of control overhead andcell coverage in defining the scheduling unit in the time domain.

In order to satisfy requirements of various NR usage scenariossimultaneously, it is necessary to support mixed numerology structuresupporting the numerology of subcarrier spacing (e.g. larger subcarrierspacing such as 60 kHz, 120 kHa, etc.) which easily define a short timedomain resource allocation unit suitable for the URLLC and thenumerology of subcarrier spacing (15 kHz for eMBB or 3.75 kHz for themMTC) suitable for the eMBB and the mMTC by a single NR carrier. It isalso necessary to simultaneously support the time domain schedulingunits with different lengths from each other, such as a subframe, a slotor a mini-slot, within the NR carrier operating in any one numerology.

As a method for satisfying the above requirements, it may i)semi-statically allocate time/frequency resources (or regions) based onthe optimal scheduling unit for each usage scenario and ii) allocateresources using time/frequency resources of the corresponding regionaccording to the usage scenarios for each user equipment.

However, such a semi-static method may reduce efficiency from theviewpoint of NR system. For example, it may not be desirable to dedicatea time/frequency resource that always supports a short time domainscheduling unit to satisfy the sparse URLLC service in any NR cell inwhich URLLC traffic occurs sparsely.

For solving this problem, a method may be provided for dynamically usinga part of scheduling resources of eMBB or mMTC whenever a correspondingURLLC traffic is generated in order to satisfy the corresponding URLLClatency requirement in accordance with at least one embodiment.

For this method the present disclosure introduces a method forpuncturing/pre-empting a part of already allocated data channel resourcefor the eMBB or the mMTC, and transmitting/receiving the URLLC trafficthrough the corresponding resource in accordance with at least oneembodiment

Definition of Dynamic “Puncturing Indication Channel/Pre-EmptionIndication Signal”

FIG. 1 to FIG. 3 are diagrams illustrating exemplary resource allocationschemes for transmitting and receiving data in order to satisfy varioususage scenarios in in a next generation radio access network accordingto the present embodiments.

When one subframe made up of X OFDM symbols or one slot composed of YOFDM symbols or mini-slot formed of Z OFDM symbols is configured as ascheduling unit in the time domain for the eMBB (or mMTC) in any NRcarrier, or when a time domain scheduling unit for the eMBB (or mMTC) isconstructed by concatenation of one or more subframes, slots ormini-slots in succession, transmission/reception of the downlink controlchannel including the scheduling information for the eMBB (or mMTC) userequipment may be performed in the scheduling unit of the correspondingtime domain.

That is, when the length of the scheduling unit of the time domain for adownlink (or uplink) data channel of an arbitrary eMBB (or mMTC) userequipment is P as shown in FIG. 1, the user equipment may be defined toreceive the scheduling control information transmitted from the basestation with the minimum period of the P. Further, a downlink controlchannel for transmitting the corresponding scheduling controlinformation may be defined based on the above mentioned scheme.

In this case, when the number of OFDM symbols forming the correspondingtime domain scheduling interval P is Q, the corresponding Q value hasone of values of X, Y, and Z, or multiple of X, Y, and Z according tothe time domain scheduling unit configuration.

As described above, among the Q OFDM symbols forming the scheduling unitfor the downlink data (or uplink data) defined for any eMBB (or mMTC)user equipment, the base station may use a part of time resource (i.e.,any k OFDM symbol(s), k<Q) for urgent URLLC traffictransmission/reception. A method for enabling a base station to use kOFDM symbol (s) for the urgent URLLC traffic transmission/reception maybe defined to support a dynamic puncturing/pre-emption indication thatthe base station may indicate puncturing/pre-emption of thetransmission/reception of the downlink data (or uplink data) in any kOFDM symbols (s) among the Q OFDM symbols for any eMBB (or mMTC) userequipment.

As the detailed method, a dynamic puncturing indication channel/dynamicpre-emption indication signal is defined for indicating dynamic timeresource puncturing/pre-emption within the corresponding scheduling timeinterval P. The base station may indicate, to the eMBB (or mMTC) userequipment, any k OFDM symbol (s) to be used for the ULLC traffictransmission/reception among the Q OFDM symbols allocated for downlink(or uplink) data transmission/reception of the corresponding eMBB (ormMTC) through the dynamic puncturing indication channel/dynamicpre-emption indication signal.

Specifically, as shown in FIG. 1, the base station may be defined totransmit the dynamic puncturing indication channel/dynamic pre-emptionindication signal through any one or more OFDM symbols in the schedulingtime interval P, and the eMBB (or mMTC) user equipment may be defined topuncture/pre-empt the downlink data reception (or uplink datatransmission) in the k OFDM symbol(s) among the Q OFDM symbols allocatedfor its own data transmission/reception after receiving the dynamicpuncturing indication channel/dynamic pre-emption indication signal.

That is, a NR user equipment may be defined to monitor the dynamicpuncturing indication channel/dynamic pre-emption indication signalwhich is transmitted from the base station within the time domainscheduling unit at a constant period in the time domain schedulinginterval, P, or the base station may be defined to configure the dynamicpuncturing indication channel/dynamic pre-emption indication signal(through cell-specific, UE-specific RRC signaling, or DCI).=

When a NR user equipment is allocated with resources for the downlinkdata (or uplink data) through a scheduling interval, P, and when the NRuser equipment receives the dynamic puncturing indicationchannel/dynamic pre-emption indication signal in the correspondingscheduling interval, P, the NR user equipment may be defined todetermine that the puncturing/pre-emption for the downlink data isperformed at the k consecutive OFDM symbols after receiving the dynamicpuncturing indication channel/dynamic pre-emption indication signal, orthe NR user equipment may be defined to stop the uplink datatransmission during the k consecutive OFDM symbols.

Unlike FIG. 1, in accordance with another embodiment, a gap may be addedbetween i) the OFDM symbol(s) for transmitting and receiving the dynamicpuncturing indication channel/dynamic pre-emption indication signal andii) the k punctured or pre-empted OFDM symbol(s), as shown in FIG. 3.

A k value indicating the number of punctured or pre-empted OFDM symbolsmay be signaled through the corresponding dynamic puncturing indicationchannel/dynamic pre-emption indication signal. Furthermore, the k valueindicating the number of punctured or pre-empted OFDM symbols may be i)semi-statically configured through cell-specific/UE specific RRCsignaling, ii) defined using a function of a subcarrier spacing for theeMBB (or mMTC) user equipment and a subcarrier spacing for the URLLC, oriii) defined using a function of a size of the time domain schedulingunit for the eMBB (or mMTC) user equipment such as the value of P (or Q)and the length of the domain scheduling unit.

In addition, when a timing gap between the dynamic puncturing indicationchannel/dynamic pre-emption indication signal and thepunctured/pre-empted k OFDM symbol(s) is defined as described above, thecorresponding timing gap may be i) defined to have afixed value (e.g., 1OFDM symbol) in consideration with a processing time of the userequipment, ii) transmitted via the corresponding dynamic puncturingindication channel/dynamic pre-emption indication signal, or iii)configured through cell-specific/UE-specific RRC signaling.

Additionally, the dynamic puncturing indication channel/dynamicpre-emption indication signal for a user equipment may be transmittedthrough the frequency resource allocated for downlink data transmissionto the corresponding user equipment as shown in case a of FIG. 1 or thedifferent frequency resource as shown in case b of FIG. 2.

If in-band transmission is supported, the data puncturing/pre-emptionmay be defined to be performed i) at all resources of the OFDM symbol(s) for transmitting the dynamic puncturing indication channel/dynamicpre-emption indication signal or ii) at resource elements (REs) foractually transmitting dynamic puncturing indication channel/dynamicpre-emption indication signal as shown in FIG. 1 and for transmittingdata in the remaining RE, within the corresponding OFDM symbol(s).

In addition, the dynamic puncturing indication channel/dynamicpre-emption indication signal may be UE-specifically transmitted inorder to perform the puncturing/pre-emption to UE-specifically.Furthermore, the dynamic puncturing indication channel/dynamicpre-emption indication signal may be cell-specifically transmitted inorder to commonly apply the same puncturing/pre-emption to all scheduleduser equipments in the scheduling interval.

In addition, in accordance with at least one embodiment a NR userequipment may be defied to perform data transmission/reception by ratematching through the remaining available resource except of the REscomposed of the k OFDM symbols as well as the datapuncturing/pre-emption mechanism for the k punctured/pre-empted OFDMsymbol(s) according to the corresponding dynamic puncturing/pre-emptionindication information within the scheduling interval, P (or Q OFDMsymbols) allocated for the downlink data (or uplink data)transmission/reception.

FIG. 4 and FIG. 5 are diagrams illustrating a method of transmitting andreceiving data in a next generation radio access network according tothe present embodiments.

FIG. 4 is diagram illustrating a method of transmitting and receivingdata by a base station in a next generation radio access network inaccordance with at least one embodiment.

Referring to FIG. 4, a base station configures a time domain schedulingunit suitable for a first user equipment (for example, the eMBB, themMTC) requiring a long time domain resource allocation at S400 andallocates a downlink resource for the first user equipment according tothe configured time domain scheduling unit at S410.

The base station punctures or pre-empt k OFDM symbol(s) for a seconduser equipment among Q OFDM symbols allocated for the first userequipment at S420.

Here, the second user equipment may be a user equipment (e.g., URLLC)suitable for the time domain scheduling unit different from that of thefirst user equipment.

The base station allocates the punctured/pre-empted resource to aresource for the second user equipment at S430 and transmits informationon the punctured/pre-empted resource through a puncturing indicationchannel/pre-emption indication signal to the first user equipment atS440.

The base station may transmit the puncturing indicationchannel/pre-emption indication signal through dynamic signaling to thefirst user equipment. The base station may transmit the puncturingindication channel/pre-emption indication signal within the time domainscheduling unit allocated for the first user equipment.

The base station may configure a symbol to transmit the puncturingindication channel/pre-emption indication signal adjacent to thepunctured/pre-empted symbol. The base station may additionally define agap between the symbol to transmit the puncturing indicationchannel/pre-emption indication signal and the punctured/pre-emptedsymbol.

The base station may puncture/pre-empt a part of the resource in theresource allocation structure for the user equipment suitable for thelong time domain scheduling unit, such as the first user equipment, todynamically allocate the resource for the second user equipment in thetime domain scheduling unit for the first user equipment.

Therefore, the base station may effectively allocate the resource forthe user equipment suitable for the different time domain schedulingunit from each other and allocate the resource for the user equipmentsuitable for the short time domain scheduling unit in the resourceallocation structure for the user equipment of the long time domainscheduling unit.

FIG. 5 is diagram illustrating a method of transmitting and receivingdata by a user equipment in a next generation radio access network inaccording with at least one embodiment.

Referring to FIG. 5, a user equipment transmits/receives data throughallocated resource by the base station at S500.

The user equipment monitors the dynamic puncturing indicationchannel/dynamic pre-emption indication signal which is transmitted fromthe base station within the time domain scheduling unit at a constantperiod.

When the puncturing indication channel/pre-emption indication signal istransmitted from the base station, the user equipment receives itthrough a symbol within the time domain scheduling unit at S510.

The user equipment checks information about the punctured/pre-emptedsymbol for the other user equipment within the allocated time domainscheduling unit through the puncturing indication channel/pre-emptionindication signal.

The user equipment stops transmitting/receiving the data at thepunctured/pre-empted resource at S520 so that the other user equipmentsuitable for different time domain scheduling unit from the userequipment may transmit/receive the data through the punctured/pre-emptedresource.

Here, the user equipment may determine whether k consecutive OFDMsymbol(s) after the symbol of receiving the puncturing indicationchannel/pre-emption indication signal is punctured/pre-empted. There maybe a gap between the symbol to transmit the puncturing indicationchannel/pre-emption indication signal and the punctured/pre-emptedsymbol. In this case, the position/location of the punctured/pre-emptedsymbol may be determined in consideration of such the gap.

If the user equipment receives the puncturing indicationchannel/pre-emption indication signal within the time domain schedulingunit from the base station, it doesn't perform thetransmission/reception of the data in the punctured/pre-empted symbol,so that the other user equipment may transmit/receive the data in thetime domain scheduling unit allocated for the user equipment.

FIG. 6 is a diagram illustrating a base station according to at leastone embodiment of the present disclosure.

Referring to FIG. 6, a base station 600 according to embodiments of thepresent disclosure includes a controller 610, a transmitter 620, and areceiver 630.

The controller 610 is configured to control the overall operations ofthe base station 600 for using a part of time domain resource amongsymbols constituting the scheduling unit for downlink data defined forthe eMBB (or mMTC) user equipment for urgent URLLC traffictransmission/reception according to the embodiments of the presentdisclosure described above.

The transmitter 620 and the receiver 630 are used to transmit/receivesignals, messages, and data necessary for carrying out the presentdisclosure described above, to/from the UE.

FIG. 7 is a diagram illustrating a user equipment according to at leastone embodiment of the present disclosure.

Referring to FIG. 7, a user equipment 700 according to embodiments ofthe present disclosure includes a receiver 710, a controller 720, and atransmitter 730.

The receiver 710 is configured to receive DL control information anddata, messages through a corresponding channel from a BS.

The controller 720 is configured to control the overall operations ofthe UE 1100 for using a part of time domain resource among the symbolsconstituting the scheduling unit for downlink data defined for the eMBB(or mMTC) user equipment for urgent URLLC traffic transmission/receptionaccording to the embodiments of the present disclosure described above.

The transmitter 730 is configured to transmit UL control information anddata, messages to the base station through a corresponding channel.

The standardized specifications or standard documents related to theembodiments described above have been omitted in order to simplify thedescription but constitute a part of the present disclosure.Accordingly, it should be construed that the incorporation of thecontent of the standardized specifications and part of the standarddocuments into the detailed description and claims is included withinthe scope of the present disclosure.

Although a preferred embodiment of the present disclosure has beendescribed for illustrative purposes, those skilled in the art willappreciate that various modifications, additions and substitutions arepossible, without departing from the scope and spirit of the inventionas disclosed in the accompanying claims. Therefore, exemplary aspects ofthe present disclosure have not been described for limiting purposes,but to describe the embodiments, the therefore, the scope of the presentdisclosure shall not be limited to such embodiments. The scope ofprotection of the present disclosure should be construed based on thefollowing claims, and all technical ideas within the scope ofequivalents thereof should be construed as being included within thescope of the present disclosure.

The invention claimed is:
 1. A method of transmitting/receiving data bya base station in a radio access network, the method comprising:configuring a time domain scheduling unit made up of at least one OFDMsymbol for each user equipment; allocating a downlink data channeltransmission resource within the time domain scheduling unit to a firstuser equipment; without using a predetermined part of the downlink datachannel transmission resource allocated to the first user equipment,allocating the predetermined part of the downlink data channeltransmission resource to a second user equipment; and transmitting, tothe first user equipment, pre-emption indication information thatindicates the predetermined part of the downlink data channeltransmission resource, which is allocated to the second user equipment,based on predefined timing information between the transmittedpre-emption indication information and the predetermined part of thedownlink data channel transmission resource, wherein k, which is thenumber of OFDM symbols constituting the predetermined part of thedownlink data channel transmission resource for transmission, is definedusing a function of a subcarrier spacing for the first user equipment,and wherein k is a natural number greater than or equal to
 1. 2. Themethod according to claim 1, wherein the base station transmits thepre-emption indication information to the first user equipment throughdynamic signaling.
 3. The method according to claim 2, furthercomprises: transmitting the pre-emption indication information to thefirst user equipment within the time domain scheduling unit includingthe predetermined part of the downlink data channel transmissionresource which is allocated to the second user equipment.
 4. The methodaccording to claim 2, wherein the base station transmits the pre-emptionindication information to the first user equipment for allocating thepredetermined part of resource within the time domain scheduling unit tothe second user equipment.
 5. The method according to claim 1, whereinthe second user equipment has a time domain scheduling unit that isshorter than that of the first user equipment.
 6. A method oftransmitting/receiving data by a first user equipment in a radio accessnetwork, the method comprising: transmitting/receiving the data from abase station through a resource with a time domain scheduling unit,which is allocated for data transmission to the first user equipment;receiving pre-emption indication information from the base station,wherein the pre-emption indication information indicates a predeterminedpart of the resource, which was initially allocated for datatransmission to the first user equipment, but not used for datatransmission to the first user equipment, and re-allocated to a seconduser equipment based on predefined timing information between thetransmitted pre-emption indication information and the predeterminedpart of the downlink data channel transmission resource; and stoppingtransmitting/receiving the data according to the pre-emption indicationinformation, wherein k, which is the number of OFDM symbols constitutingthe predetermined part of the resource, is defined using a function of asubcarrier spacing, and wherein k is a natural number greater than orequal to
 1. 7. The method according to claim 6, wherein the first userequipment receives the pre-emption indication information throughdynamic signaling.
 8. The method according to claim 6, wherein thepredetermined part of the resource according to the pre-emptionindication information is allocated for data transmission/reception ofsecond user equipment which has different time domain scheduling unitfrom the first user equipment.
 9. A first user equipmenttransmitting/receiving data in a radio access network, the first userequipment comprising: a receiver configured to receive the data from abase station through a resource with a time domain scheduling unit,which is allocated for data transmission to the first user equipment andreceive pre-emption indication information from the base station,wherein the pre-emption indication information indicates a predeterminedpart of the resource, which was initially allocated for datatransmission to the first user equipment, but not used for datatransmission to the first user equipment, and re-allocated for datatransmission to a second user equipment, based on predefined timinginformation between the transmitted pre-emption indication informationand the predetermined part of the downlink data channel transmissionresource; and a controller configured to stop transmitting/receiving thedata according to the pre-emption indication information, wherein k,which is the number of OFDM symbols constituting the predetermined partof the resource, is defined using a function of a subcarrier spacing,and wherein k is a natural number greater than or equal to
 1. 10. Thefirst user equipment according to claim 9, wherein the first userequipment receives the pre-emption indication information throughdynamic signaling.
 11. The first user equipment according to 9, whereinthe predetermined part of the resource according to the pre-emptionindication information is allocated for data transmission/reception ofthe second user equipment which has different time domain schedulingunit from the first user equipment.